Chattery is a word that describes someone who talks excessively or in a rapid, bubbly manner. Some synonyms for chattery include talkative, loquacious, garrulous, voluble, and effusive. Talkative suggests someone who enjoys conversation or is inclined to talk a lot. Loquacious emphasizes that the person talks a great deal, often without much thought. Garrulous implies that the person talks too much, and the speech tends to be annoying or tedious. Voluble emphasizes the fluency and ease of the person's speech. Effusive suggests that the person is highly expressive and enthusiastic. So, depending on the context, there could be many words you could choose that are based on the same idea of someone who talks a lot.